[linux-2.6-block.git] / drivers / power / tps65090-charger.c

/*
 * Battery charger driver for TI's tps65090
 *
 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.

 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.

 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.

 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/freezer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>

#include <linux/mfd/tps65090.h>

#define TPS65090_CHARGER_ENABLE	BIT(0)
#define TPS65090_VACG		BIT(1)
#define TPS65090_NOITERM	BIT(5)

#define POLL_INTERVAL		(HZ * 2)	/* Used when no irq */

struct tps65090_charger {
	struct	device	*dev;
	int	ac_online;
	int	prev_ac_online;
	int	irq;
	struct task_struct	*poll_task;
	bool			passive_mode;
	struct power_supply	*ac;
	struct tps65090_platform_data *pdata;
};

static enum power_supply_property tps65090_ac_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

static int tps65090_low_chrg_current(struct tps65090_charger *charger)
{
	int ret;

	if (charger->passive_mode)
		return 0;

	ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL5,
			TPS65090_NOITERM);
	if (ret < 0) {
		dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
			__func__, TPS65090_REG_CG_CTRL5);
		return ret;
	}
	return 0;
}

static int tps65090_enable_charging(struct tps65090_charger *charger)
{
	int ret;
	uint8_t ctrl0 = 0;

	if (charger->passive_mode)
		return 0;

	ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_CTRL0,
			    &ctrl0);
	if (ret < 0) {
		dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
				__func__, TPS65090_REG_CG_CTRL0);
		return ret;
	}

	ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL0,
				(ctrl0 | TPS65090_CHARGER_ENABLE));
	if (ret < 0) {
		dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
				__func__, TPS65090_REG_CG_CTRL0);
		return ret;
	}
	return 0;
}

static int tps65090_config_charger(struct tps65090_charger *charger)
{
	uint8_t intrmask = 0;
	int ret;

	if (charger->passive_mode)
		return 0;

	if (charger->pdata->enable_low_current_chrg) {
		ret = tps65090_low_chrg_current(charger);
		if (ret < 0) {
			dev_err(charger->dev,
				"error configuring low charge current\n");
			return ret;
		}
	}

	/* Enable the VACG interrupt for AC power detect */
	ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_MASK,
			    &intrmask);
	if (ret < 0) {
		dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
			__func__, TPS65090_REG_INTR_MASK);
		return ret;
	}

	ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_MASK,
			     (intrmask | TPS65090_VACG));
	if (ret < 0) {
		dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
			__func__, TPS65090_REG_CG_CTRL0);
		return ret;
	}

	return 0;
}

static int tps65090_ac_get_property(struct power_supply *psy,
			enum power_supply_property psp,
			union power_supply_propval *val)
{
	struct tps65090_charger *charger = power_supply_get_drvdata(psy);

	if (psp == POWER_SUPPLY_PROP_ONLINE) {
		val->intval = charger->ac_online;
		charger->prev_ac_online = charger->ac_online;
		return 0;
	}
	return -EINVAL;
}

static irqreturn_t tps65090_charger_isr(int irq, void *dev_id)
{
	struct tps65090_charger *charger = dev_id;
	int ret;
	uint8_t status1 = 0;
	uint8_t intrsts = 0;

	ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_STATUS1,
			    &status1);
	if (ret < 0) {
		dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
				__func__, TPS65090_REG_CG_STATUS1);
		return IRQ_HANDLED;
	}
	msleep(75);
	ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_STS,
			    &intrsts);
	if (ret < 0) {
		dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
				__func__, TPS65090_REG_INTR_STS);
		return IRQ_HANDLED;
	}

	if (intrsts & TPS65090_VACG) {
		ret = tps65090_enable_charging(charger);
		if (ret < 0)
			return IRQ_HANDLED;
		charger->ac_online = 1;
	} else {
		charger->ac_online = 0;
	}

	/* Clear interrupts. */
	if (!charger->passive_mode) {
		ret = tps65090_write(charger->dev->parent,
				     TPS65090_REG_INTR_STS, 0x00);
		if (ret < 0) {
			dev_err(charger->dev,
				"%s(): Error in writing reg 0x%x\n",
				__func__, TPS65090_REG_INTR_STS);
		}
	}

	if (charger->prev_ac_online != charger->ac_online)
		power_supply_changed(charger->ac);

	return IRQ_HANDLED;
}

static struct tps65090_platform_data *
		tps65090_parse_dt_charger_data(struct platform_device *pdev)
{
	struct tps65090_platform_data *pdata;
	struct device_node *np = pdev->dev.of_node;
	unsigned int prop;

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
		dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n");
		return NULL;
	}

	prop = of_property_read_bool(np, "ti,enable-low-current-chrg");
	pdata->enable_low_current_chrg = prop;

	pdata->irq_base = -1;

	return pdata;

}

static int tps65090_charger_poll_task(void *data)
{
	set_freezable();

	while (!kthread_should_stop()) {
		schedule_timeout_interruptible(POLL_INTERVAL);
		try_to_freeze();
		tps65090_charger_isr(-1, data);
	}
	return 0;
}

static const struct power_supply_desc tps65090_charger_desc = {
	.name			= "tps65090-ac",
	.type			= POWER_SUPPLY_TYPE_MAINS,
	.get_property		= tps65090_ac_get_property,
	.properties		= tps65090_ac_props,
	.num_properties		= ARRAY_SIZE(tps65090_ac_props),
};

static int tps65090_charger_probe(struct platform_device *pdev)
{
	struct tps65090_charger *cdata;
	struct tps65090_platform_data *pdata;
	struct power_supply_config psy_cfg = {};
	uint8_t status1 = 0;
	int ret;
	int irq;

	pdata = dev_get_platdata(pdev->dev.parent);

	if (IS_ENABLED(CONFIG_OF) && !pdata && pdev->dev.of_node)
		pdata = tps65090_parse_dt_charger_data(pdev);

	if (!pdata) {
		dev_err(&pdev->dev, "%s():no platform data available\n",
				__func__);
		return -ENODEV;
	}

	cdata = devm_kzalloc(&pdev->dev, sizeof(*cdata), GFP_KERNEL);
	if (!cdata) {
		dev_err(&pdev->dev, "failed to allocate memory status\n");
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, cdata);

	cdata->dev			= &pdev->dev;
	cdata->pdata			= pdata;

	psy_cfg.supplied_to		= pdata->supplied_to;
	psy_cfg.num_supplicants		= pdata->num_supplicants;
	psy_cfg.of_node			= pdev->dev.of_node;
	psy_cfg.drv_data		= cdata;

	cdata->ac = power_supply_register(&pdev->dev, &tps65090_charger_desc,
			&psy_cfg);
	if (IS_ERR(cdata->ac)) {
		dev_err(&pdev->dev, "failed: power supply register\n");
		return PTR_ERR(cdata->ac);
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		irq = -ENXIO;
	cdata->irq = irq;

	ret = tps65090_config_charger(cdata);
	if (ret < 0) {
		dev_err(&pdev->dev, "charger config failed, err %d\n", ret);
		goto fail_unregister_supply;
	}

	/* Check for charger presence */
	ret = tps65090_read(cdata->dev->parent, TPS65090_REG_CG_STATUS1,
			&status1);
	if (ret < 0) {
		dev_err(cdata->dev, "%s(): Error in reading reg 0x%x", __func__,
			TPS65090_REG_CG_STATUS1);
		goto fail_unregister_supply;
	}

	if (status1 != 0) {
		ret = tps65090_enable_charging(cdata);
		if (ret < 0) {
			dev_err(cdata->dev, "error enabling charger\n");
			goto fail_unregister_supply;
		}
		cdata->ac_online = 1;
		power_supply_changed(cdata->ac);
	}

	if (irq != -ENXIO) {
		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
			tps65090_charger_isr, 0, "tps65090-charger", cdata);
		if (ret) {
			dev_err(cdata->dev,
				"Unable to register irq %d err %d\n", irq,
				ret);
			goto fail_unregister_supply;
		}
	} else {
		cdata->poll_task = kthread_run(tps65090_charger_poll_task,
					      cdata, "ktps65090charger");
		cdata->passive_mode = true;
		if (IS_ERR(cdata->poll_task)) {
			ret = PTR_ERR(cdata->poll_task);
			dev_err(cdata->dev,
				"Unable to run kthread err %d\n", ret);
			goto fail_unregister_supply;
		}
	}

	return 0;

fail_unregister_supply:
	power_supply_unregister(cdata->ac);

	return ret;
}

static int tps65090_charger_remove(struct platform_device *pdev)
{
	struct tps65090_charger *cdata = platform_get_drvdata(pdev);

	if (cdata->irq == -ENXIO)
		kthread_stop(cdata->poll_task);
	power_supply_unregister(cdata->ac);

	return 0;
}

static const struct of_device_id of_tps65090_charger_match[] = {
	{ .compatible = "ti,tps65090-charger", },
	{ /* end */ }
};
MODULE_DEVICE_TABLE(of, of_tps65090_charger_match);

static struct platform_driver tps65090_charger_driver = {
	.driver	= {
		.name	= "tps65090-charger",
		.of_match_table = of_tps65090_charger_match,
	},
	.probe	= tps65090_charger_probe,
	.remove = tps65090_charger_remove,
};
module_platform_driver(tps65090_charger_driver);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Syed Rafiuddin <srafiuddin@nvidia.com>");
MODULE_DESCRIPTION("tps65090 battery charger driver");
Commit	Line	Data
6f8da5df RK	1	/*
	2	* Battery charger driver for TI's tps65090
	3	*
	4	* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
	5
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
e47bcba4	18	#include <linux/delay.h>
6f8da5df	19	#include <linux/err.h>
193dcced	20	#include <linux/freezer.h>
6f8da5df RK	21	#include <linux/init.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/kernel.h>
193dcced	24	#include <linux/kthread.h>
6f8da5df	25	#include <linux/module.h>
e47bcba4	26	#include <linux/of_device.h>
6f8da5df RK	27	#include <linux/platform_device.h>
6f8da5df RK	28	#include <linux/power_supply.h>
e47bcba4 MB	29	#include <linux/slab.h>
e47bcba4 MB	30
6f8da5df RK	31	#include <linux/mfd/tps65090.h>
6f8da5df RK	32
6f8da5df RK	33	#define TPS65090_CHARGER_ENABLE BIT(0)
	34	#define TPS65090_VACG BIT(1)
	35	#define TPS65090_NOITERM BIT(5)
	36
193dcced DA	37	#define POLL_INTERVAL (HZ * 2) /* Used when no irq */
193dcced DA	38
6f8da5df RK	39	struct tps65090_charger {
	40	struct device *dev;
	41	int ac_online;
	42	int prev_ac_online;
	43	int irq;
193dcced DA	44	struct task_struct *poll_task;
193dcced DA	45	bool passive_mode;
297d716f	46	struct power_supply *ac;
6f8da5df RK	47	struct tps65090_platform_data *pdata;
	48	};
	49
	50	static enum power_supply_property tps65090_ac_props[] = {
	51	POWER_SUPPLY_PROP_ONLINE,
	52	};
	53
	54	static int tps65090_low_chrg_current(struct tps65090_charger *charger)
	55	{
	56	int ret;
	57
193dcced DA	58	if (charger->passive_mode)
	59	return 0;
	60
6f8da5df RK	61	ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL5,
	62	TPS65090_NOITERM);
	63	if (ret < 0) {
	64	dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
	65	__func__, TPS65090_REG_CG_CTRL5);
	66	return ret;
	67	}
	68	return 0;
	69	}
	70
e2414217	71	static int tps65090_enable_charging(struct tps65090_charger *charger)
6f8da5df RK	72	{
	73	int ret;
	74	uint8_t ctrl0 = 0;
	75
193dcced DA	76	if (charger->passive_mode)
	77	return 0;
	78
6f8da5df RK	79	ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_CTRL0,
	80	&ctrl0);
	81	if (ret < 0) {
	82	dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
	83	__func__, TPS65090_REG_CG_CTRL0);
	84	return ret;
	85	}
	86
	87	ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL0,
	88	(ctrl0 \| TPS65090_CHARGER_ENABLE));
	89	if (ret < 0) {
e2414217	90	dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
6f8da5df RK	91	__func__, TPS65090_REG_CG_CTRL0);
	92	return ret;
	93	}
	94	return 0;
	95	}
	96
	97	static int tps65090_config_charger(struct tps65090_charger *charger)
	98	{
e2414217	99	uint8_t intrmask = 0;
6f8da5df RK	100	int ret;
6f8da5df RK	101
193dcced DA	102	if (charger->passive_mode)
	103	return 0;
	104
6f8da5df RK	105	if (charger->pdata->enable_low_current_chrg) {
	106	ret = tps65090_low_chrg_current(charger);
	107	if (ret < 0) {
	108	dev_err(charger->dev,
	109	"error configuring low charge current\n");
	110	return ret;
	111	}
	112	}
	113
e2414217 AC	114	/* Enable the VACG interrupt for AC power detect */
	115	ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_MASK,
	116	&intrmask);
	117	if (ret < 0) {
	118	dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
	119	__func__, TPS65090_REG_INTR_MASK);
	120	return ret;
	121	}
	122
	123	ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_MASK,
	124	(intrmask \| TPS65090_VACG));
	125	if (ret < 0) {
	126	dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
	127	__func__, TPS65090_REG_CG_CTRL0);
	128	return ret;
	129	}
	130
6f8da5df RK	131	return 0;
	132	}
	133
	134	static int tps65090_ac_get_property(struct power_supply *psy,
	135	enum power_supply_property psp,
	136	union power_supply_propval *val)
	137	{
297d716f	138	struct tps65090_charger *charger = power_supply_get_drvdata(psy);
6f8da5df RK	139
	140	if (psp == POWER_SUPPLY_PROP_ONLINE) {
	141	val->intval = charger->ac_online;
	142	charger->prev_ac_online = charger->ac_online;
	143	return 0;
	144	}
	145	return -EINVAL;
	146	}
	147
	148	static irqreturn_t tps65090_charger_isr(int irq, void *dev_id)
	149	{
	150	struct tps65090_charger *charger = dev_id;
	151	int ret;
	152	uint8_t status1 = 0;
	153	uint8_t intrsts = 0;
	154
	155	ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_STATUS1,
	156	&status1);
	157	if (ret < 0) {
	158	dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
	159	__func__, TPS65090_REG_CG_STATUS1);
	160	return IRQ_HANDLED;
	161	}
	162	msleep(75);
	163	ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_STS,
	164	&intrsts);
	165	if (ret < 0) {
	166	dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
	167	__func__, TPS65090_REG_INTR_STS);
	168	return IRQ_HANDLED;
	169	}
	170
	171	if (intrsts & TPS65090_VACG) {
e2414217	172	ret = tps65090_enable_charging(charger);
6f8da5df RK	173	if (ret < 0)
	174	return IRQ_HANDLED;
	175	charger->ac_online = 1;
	176	} else {
	177	charger->ac_online = 0;
	178	}
	179
e2414217	180	/* Clear interrupts. */
193dcced DA	181	if (!charger->passive_mode) {
	182	ret = tps65090_write(charger->dev->parent,
	183	TPS65090_REG_INTR_STS, 0x00);
	184	if (ret < 0) {
	185	dev_err(charger->dev,
	186	"%s(): Error in writing reg 0x%x\n",
e2414217	187	__func__, TPS65090_REG_INTR_STS);
193dcced	188	}
e2414217 AC	189	}
e2414217 AC	190
6f8da5df	191	if (charger->prev_ac_online != charger->ac_online)
297d716f	192	power_supply_changed(charger->ac);
6f8da5df RK	193
	194	return IRQ_HANDLED;
	195	}
	196
6f8da5df RK	197	static struct tps65090_platform_data *
	198	tps65090_parse_dt_charger_data(struct platform_device *pdev)
	199	{
	200	struct tps65090_platform_data *pdata;
594f8f88	201	struct device_node *np = pdev->dev.of_node;
6f8da5df RK	202	unsigned int prop;
	203
	204	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	205	if (!pdata) {
	206	dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n");
	207	return NULL;
	208	}
	209
	210	prop = of_property_read_bool(np, "ti,enable-low-current-chrg");
	211	pdata->enable_low_current_chrg = prop;
	212
	213	pdata->irq_base = -1;
	214
	215	return pdata;
	216
	217	}
6f8da5df	218
193dcced DA	219	static int tps65090_charger_poll_task(void *data)
	220	{
	221	set_freezable();
	222
	223	while (!kthread_should_stop()) {
	224	schedule_timeout_interruptible(POLL_INTERVAL);
	225	try_to_freeze();
	226	tps65090_charger_isr(-1, data);
	227	}
	228	return 0;
	229	}
	230
297d716f KK	231	static const struct power_supply_desc tps65090_charger_desc = {
	232	.name = "tps65090-ac",
	233	.type = POWER_SUPPLY_TYPE_MAINS,
	234	.get_property = tps65090_ac_get_property,
	235	.properties = tps65090_ac_props,
	236	.num_properties = ARRAY_SIZE(tps65090_ac_props),
	237	};
	238
6f8da5df RK	239	static int tps65090_charger_probe(struct platform_device *pdev)
6f8da5df RK	240	{
6f8da5df RK	241	struct tps65090_charger *cdata;
6f8da5df RK	242	struct tps65090_platform_data *pdata;
2dc9215d	243	struct power_supply_config psy_cfg = {};
6f8da5df RK	244	uint8_t status1 = 0;
	245	int ret;
	246	int irq;
	247
	248	pdata = dev_get_platdata(pdev->dev.parent);
	249
e47bcba4	250	if (IS_ENABLED(CONFIG_OF) && !pdata && pdev->dev.of_node)
6f8da5df RK	251	pdata = tps65090_parse_dt_charger_data(pdev);
	252
	253	if (!pdata) {
	254	dev_err(&pdev->dev, "%s():no platform data available\n",
	255	__func__);
	256	return -ENODEV;
	257	}
	258
	259	cdata = devm_kzalloc(&pdev->dev, sizeof(*cdata), GFP_KERNEL);
	260	if (!cdata) {
	261	dev_err(&pdev->dev, "failed to allocate memory status\n");
	262	return -ENOMEM;
	263	}
	264
e0835879	265	platform_set_drvdata(pdev, cdata);
6f8da5df RK	266
	267	cdata->dev = &pdev->dev;
	268	cdata->pdata = pdata;
	269
2dc9215d KK	270	psy_cfg.supplied_to = pdata->supplied_to;
	271	psy_cfg.num_supplicants = pdata->num_supplicants;
	272	psy_cfg.of_node = pdev->dev.of_node;
297d716f	273	psy_cfg.drv_data = cdata;
2dc9215d	274
297d716f KK	275	cdata->ac = power_supply_register(&pdev->dev, &tps65090_charger_desc,
	276	&psy_cfg);
	277	if (IS_ERR(cdata->ac)) {
6f8da5df	278	dev_err(&pdev->dev, "failed: power supply register\n");
297d716f	279	return PTR_ERR(cdata->ac);
6f8da5df RK	280	}
	281
	282	irq = platform_get_irq(pdev, 0);
193dcced DA	283	if (irq < 0)
193dcced DA	284	irq = -ENXIO;
6f8da5df RK	285	cdata->irq = irq;
6f8da5df RK	286
6f8da5df RK	287	ret = tps65090_config_charger(cdata);
	288	if (ret < 0) {
	289	dev_err(&pdev->dev, "charger config failed, err %d\n", ret);
0ed81393	290	goto fail_unregister_supply;
6f8da5df RK	291	}
	292
	293	/* Check for charger presence */
	294	ret = tps65090_read(cdata->dev->parent, TPS65090_REG_CG_STATUS1,
	295	&status1);
	296	if (ret < 0) {
	297	dev_err(cdata->dev, "%s(): Error in reading reg 0x%x", __func__,
	298	TPS65090_REG_CG_STATUS1);
0ed81393	299	goto fail_unregister_supply;
6f8da5df RK	300	}
	301
	302	if (status1 != 0) {
e2414217	303	ret = tps65090_enable_charging(cdata);
6f8da5df RK	304	if (ret < 0) {
6f8da5df RK	305	dev_err(cdata->dev, "error enabling charger\n");
0ed81393	306	goto fail_unregister_supply;
6f8da5df RK	307	}
6f8da5df RK	308	cdata->ac_online = 1;
297d716f	309	power_supply_changed(cdata->ac);
6f8da5df RK	310	}
6f8da5df RK	311
193dcced DA	312	if (irq != -ENXIO) {
	313	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
	314	tps65090_charger_isr, 0, "tps65090-charger", cdata);
	315	if (ret) {
	316	dev_err(cdata->dev,
	317	"Unable to register irq %d err %d\n", irq,
	318	ret);
	319	goto fail_unregister_supply;
	320	}
	321	} else {
	322	cdata->poll_task = kthread_run(tps65090_charger_poll_task,
	323	cdata, "ktps65090charger");
	324	cdata->passive_mode = true;
	325	if (IS_ERR(cdata->poll_task)) {
	326	ret = PTR_ERR(cdata->poll_task);
	327	dev_err(cdata->dev,
	328	"Unable to run kthread err %d\n", ret);
	329	goto fail_unregister_supply;
	330	}
	331	}
	332
6f8da5df RK	333	return 0;
6f8da5df RK	334
6f8da5df	335	fail_unregister_supply:
297d716f	336	power_supply_unregister(cdata->ac);
6f8da5df RK	337
	338	return ret;
	339	}
	340
	341	static int tps65090_charger_remove(struct platform_device *pdev)
	342	{
e0835879	343	struct tps65090_charger *cdata = platform_get_drvdata(pdev);
6f8da5df	344
193dcced DA	345	if (cdata->irq == -ENXIO)
193dcced DA	346	kthread_stop(cdata->poll_task);
297d716f	347	power_supply_unregister(cdata->ac);
6f8da5df RK	348
	349	return 0;
	350	}
	351
8fb08855	352	static const struct of_device_id of_tps65090_charger_match[] = {
594f8f88 RK	353	{ .compatible = "ti,tps65090-charger", },
	354	{ /* end */ }
	355	};
c72b7bf8	356	MODULE_DEVICE_TABLE(of, of_tps65090_charger_match);
594f8f88	357
6f8da5df RK	358	static struct platform_driver tps65090_charger_driver = {
	359	.driver = {
	360	.name = "tps65090-charger",
594f8f88	361	.of_match_table = of_tps65090_charger_match,
6f8da5df RK	362	},
	363	.probe = tps65090_charger_probe,
	364	.remove = tps65090_charger_remove,
	365	};
	366	module_platform_driver(tps65090_charger_driver);
	367
	368	MODULE_LICENSE("GPL v2");
	369	MODULE_AUTHOR("Syed Rafiuddin <srafiuddin@nvidia.com>");
	370	MODULE_DESCRIPTION("tps65090 battery charger driver");